Where do I hook up the PCV on my dual carter 9605's? Rear port on rear carb, front port on front carb, or to both carbs with a tee?
If the intake has a vac port built in run it there. Otherwise the rear port on the rear carb (I am assuming that the rear port is belowe the throttle blades and large enough for the air line)
If running progressive linkage and you can possibly connect the hose or valve to the rear carb at the front of it that would be the best as it’s were most of the mixing with the blowby vapors and gasoline would occur. Next is a tossup between the rear of the rear carb or a fitting between the carbs which have used for 6 years.. But like Jim says….where ever you can is sometimes the only option.
I put mine on the rear of the front carb and I run my carbs without Progressive as that's the way I think they should be